Assembly of 1,3-Dihydro-2H-3-benzazepin-2-one Conjugates via Ugi Four-Component Reaction and Palladium-Catalyzed Hydroamidation¹
作者:Wei-Min Dai、Jinlong Wu、Yong Jiang
DOI:10.1055/s-0028-1088115
日期:2009.4
The Ugi four-component reaction (U-4CR) of a number of 2-aminophenols was carried out with 2-alknylbenzaldehydes, benzyl isocyanide, and 2-chloro-5-nitrobenzoic acid in MeOH under microwave heating (MW, 80 °C, 20 min). The reaction mixture was then directly treated with aqueous K 2 CO 3 (MW, 100 °C, 10 min) to promote an intramolecular nucleophilic aromatic substitution (S N Ar), resulting in the formation
许多 2-氨基苯酚的 Ugi 四组分反应 (U-4CR) 与 2-炔基苯甲醛、苄基异氰化物和 2-氯-5-硝基苯甲酸在 MeOH 中在微波加热 (MW, 80 °C, 20 分钟)。然后将反应混合物直接用 K 2 CO 3 水溶液(MW,100°C,10 分钟)处理以促进分子内亲核芳香取代(SN Ar),从而形成高度官能化的二苯并[b,f][1 ,4]氧氮杂-11(10H)-ones。衍生自苄基异氰化物和 2-炔基苯甲醛的 N-苄基酰胺和芳基炔基部分允许通过分子内 7-endo-dig 加氢酰胺化进一步组装 1,3-dihydro-2H-3-benzazepin-2-one 支架10 mol% Pd(PhCN) 2 Cl 2 (THF, 60 °C, 24 h, 61-74%)。